Waiting for input in Unity WebPlayer

Question

I am building a Unity3d visualization system that is embedded in a windows forms application. I can get WebPlayer and C# communication back and forth.

The WebPlayer needs to be able to draw an arbitrary number of models based on the input from the user (eg. draw 30 soccer balls and then manipulate them). I can draw objects and manipulate them just fine when the number of objects is hard-coded, but how does one go about getting user input before anything is drawn in the scene?

Currently I have a script attached to the Main Camera which does an external call to a javascript function in which I prompt for input, checks if the input is greater than 0 and initiates creation in the Update() of the camera script.

In the unity editor when I press play nothing happens until I modify the public variable and then the models get created as expected, but in the WebPlayer it just goes on drawing other stuff in the scene as if the condition wasn't there and no models are drawn since the integer is still 0.

Please help me understand how to achieve this. Thank you

In the main camera script:

public int _numObjects;
public static _creationScript;
private static bool created = false;
public static GameObject _centrePoint;

void Awake()
{
    Application.ExternalCall("getNumberOfObjects");
    _centrePoint = Resources.Load("centrePoint") as GameObject;

    _creationScript = Resources.Load("creationScript") as CreationScript;
}

public void SetNumObjects(int numObjects)
{
    _numObjects = numObjects;
}
void Update()
{
    if (_numObjects> 40 && !created)
    {
        GameObject centrePoint = GameObject.Instantiate(_centrePoint, new Vector3(0, 0, 0), new Quaternion(0, 0, 0, 0)) as GameObject;
        centrePoint.AddComponent<CreationScript>()._cameraScript = this;

        created = true;
    }
}

in javascript of the web player:

var numObjects;

function setNumObjects(num) { u.getUnity().sendMessage("Main Camera","SetNumObjects", num) }

function getNumObjects(){
    do{
        numObjects = parseInt(window.prompt("Please enter number (40-100)", ""), 10);
    }while(isNaN(numObjects) || numObjects > 100 || numObjects < 40);
    setNumObjects(numObjects );
}

and finally in the script that creates the objects which is attached to the centre point:

public int _numObjects;
public GameObject _model;
public GameObject[] _models;
public CameraScript _cameraScript;

void Start()
{
    _numObjects = _cameraScript._numObjects;        

    SetUpModels();
}

void SetUpModels()
{
    _models = new GameObject[_numObjects];

    _model = Resources.Load("model") as GameObject;

    for (int i = 0; i < _models.Length; i++)
    {
        _models[i] = Instantiate(_model, new Vector3(20, 0, 0), new Quaternion()) as GameObject;
        _models[i].RotateAround(this.transform.position, Vector3.up, i); //arrange in a circle
        _models[i].transform.LookAt(this.transform);
    }        
}